Unexplained flight changes caused problems with Chinese immigration
We booked a 3 legged flight from London to Osaka in Japan via Shanghai with a 4 day layover on the return. During our holiday we first received 4 notifications of flight time changes for our Shanghai to London leg that moved up to 90 minutes this way and that. Then we were notified that our flight had completely changed to a different one leaving 5 hours earlier. No explanation given. This caused a significant problem when we landed at Shanghai for our visa free stay as our original e-ticket had a different flight number. Intimidating immigration took two hours to complete as a result.